home | O'Reilly's CD bookshelfs | FreeBSD | Linux | Cisco | Cisco Exam ## 8.142. Math::BigFloat

• The object \$f remains unchanged.

• All methods except fcmp return a number string (nstr) of the form /[+-]\d+E[+-]\d+/, with embedded whitespace ignored.

• A return value of NaN indicates that either an input parameter was "Not a Number" or that an illegal operation was attempted.

• A similar default scale value is computed for square roots.

 new

```\$f = Math::BigFloat->new(string)
```

Creates a new object, \$f.

 fabs

```\$f->fabs(  )
```

Returns absolute value of \$f.

```\$f->fadd(nstr)
```

Returns sum of nstr and \$f.

 fcmp

```\$f->fcmp(nstr)
```

Compares \$f to nstr. Returns -1, 0, or 1 depending on whether \$f is less than, equal to, or greater than nstr, or undef if nstr is not a number.

 fdiv

```\$f->fdiv(nstr[,n])
```

Returns \$f divided by nstr to nplaces. If scale (the number of digits) is unspecified, division is computed to the number of digits given by:

`max(\$div_scale, length(dividend)+length(divisor))`
 ffround

```\$f->ffround(n)
```

Returns \$f rounded at nth place.

 fmul

```\$f->fmul(nstr)
```

Returns \$f multiplied by nstr.

 fneg

```\$f->fneg(  )
```

Returns negative of \$f.

 fnorm

```\$f->fnorm(  )
```

Returns normalization of \$f.

 fround

```\$f->fround(n)
```

Returns value of \$frounded to n digits.

 fsqrt

```\$f->fsqrt([n])
```

Returns square root of \$f to n places.

 fsub

```\$f->fsub(nstr)
```

Returns \$f minus nstr. 